Possible Clues:

• Maiden name used during date by Laura, shortly after break-up
• Opening in a lake breached by herald
• First, opening
• One bird returns missing top of painting for opening
• Address every four years
• Marking the beginning of, eg, an institution
• Introductory speech, perhaps
• Maiden's month trapped in dilapidated urinal
• Like some January balls
• Launching in river outside summer month